feat: add credit tracker integration

[KevinJoiner]

• Add credit tracker service and middleware
• Update auth and config for credit tracking
• Add e2e tests for credit tracker functionality
• Update helm charts for new feature

[linear]

EX-3648 Add Credit Tracker Check to telemetry

[Copilot]

Pull Request Overview

This PR integrates a new credit tracker service along with its middleware, updates auth and config to support credit tracking, and includes e2e tests and helm chart changes.

• Adds credit tracker client and associated methods.
• Integrates new middleware for handling credit deductions/refunds.
• Updates e2e tests and helm charts to support the new feature.

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pkg/errorhandler/errorhandler.go	Adds helper functions for error classification.
internal/service/credittracker/credittracker.go	Implements the credit tracker client with retry logic.
internal/repositories/repositories.go	Updates error handling from internal to bad request.
internal/dtcmiddleware/dctmiddleware.go	Introduces middleware for credit tracking within GraphQL.
internal/config/settings.go	Adds credit tracker endpoint to settings.
internal/auth/jwt.go	Updates GetValidatedClaims to use context.
internal/app/app.go	Integrates credit tracker middleware into server setup.
go.mod	Adds and updates dependencies for credit tracker.
e2e/setup_test.go	Sets up test container for credit tracker.
e2e/permission_test.go	Updates expected error format in permission tests.
e2e/credit_tracker_test.go	Adds e2e tests using a mock credit tracker gRPC server.
charts/telemetry-api/values.yaml	Updates helm values for credit tracker endpoint.
charts/telemetry-api/values-prod.yaml	Updates production helm values for credit tracker endpoint.

[elffjs]

We looked over this together on Wednesday, it seems good to me.